bpf: Selftests, verifier case for non null pointer check branch taken

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When we have pointer type that is known to be non-null and comparing
against zero we only follow the non-null branch. This adds tests to
cover this case for reference tracking. Also add the other case when
comparison against a non-zero value and ensure we still fail with
unreleased reference.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/159009166599.6313.1593680633787453767.stgit@john-Precision-5820-Tower

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John Fastabend 2020-05-21 13:07:46 -07:00 • committed by Alexei Starovoitov

parent cac616db39

commit c72b5cbb09

1 changed files with 33 additions and 0 deletions

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tools/testing/selftests/bpf/verifier/ref_tracking.c

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